Chapter 5 Pg 40-42 and 66-83 Flashcards
what are 5 connective tissues?
- Bone 2. cartilege 3. fibrous connective tissue 4. adipose 5. blood
what are the 2 specialzed connective tissues that constitute the skeletal system?
bone and cartilege
what are two examples of general connective tissue?
tendon and ligaments
what is the fundamental cell of bone?
osteocyte
what is the fundamental cell of cartilege?
chondrocyte
All bone and most types of cartilage are surrounded by a similar appearing coat of ——– ——– ———
fibrous connective tissue
The fibrous connective tissues is termed what when surrounding bone and what when surrounding cartilege?
bone= periosteum cartlage= perichondrium
what are the three types of cartilage?
- Hyaline cartilage 2. Fibrocartilage 3. Elastic cartilage
what kind of cartilege is this?
Hyaline cartilage
what kind of cartilage?
Fibrocartilage
what kind of cartilage is this?
Elastic cartilage
what is the most common cartilage?
Hyaline cartilage, found at the tips of ribs, within developing bones and at the ends of bones where it forms a smooth surface and thus assists the gliding motion of joints
what can you see in fibrocartilage that you can’t in the other 2?
collagen fibers
In all three cartilages you can see what?
chondrocytes
which is the least flexible cartilage?
fibrocartilage. thus it is funds in areas that experience tensile and shear forces.
what is the most flexible cartilage? why? where is it found?
elastic cartilage due to the elastic fibers within the matrix. It is found at sites where flexible support is required such as the end of the nose, epiglottis and pinna of the ear
if position is used to classify bones then what are the 2 kinds?
If visual appearance is used what 2 kinds are there?
If embryonic origin is used what are the 3 kinds?
- cortical bone- outer boundary
- Medullary bones- lies within the core.
- canceullous= spongy
- compact bones= appears dense
- Endochondral bone= most complicated; involved the formation of cartilage model of the future bones from menschyme and the subsequent replacement of this cartilage model by bone tissue.
- Dermal bone: forms directly from mesenchyme without a cartilage precursor.
- Sesamoid bones: form within tendons and are not proceeded by a cartilage model.
in the skull what are the bones, in terms of embryonic origin?
chondrocranium and splanchnocranium are endochondral and dermatocranium is dermal
details of chondrocranium embryonic formation differ among species but generally what occurs?
head mesenchyme condenses into cartilage elements which will fuse to form the embryonic chondrocranium.
In elasmobranchs this cartilagenous skull persists, develops a roof and becomes the adult braincase. However, in most vertberates these cartilagenous plates are transitory. Centers of ossification soon appear, replace the cartilage and give rise to species bones of the mature skull. These bones include what?
- occipitals (basi-, ex-, supra-)
- sphenoids
- Mesethmoid
- Otic capsule
- Optic capsule (birds, reptiles)
- nasal capsule
the splanchnocranium generally supports what?
the gills and offers attachment for the respiratory muscles.